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11. 发明申请

US20120200352A1 APPARATUS AND METHOD FOR AN INTEGRATED MULTI-MODE MULTI-BAND POWER AMPLIFIER 审中-公开
标题翻译：集成多模多功率放大器的装置和方法
公开(公告)号：US20120200352A1
公开(公告)日：2012-08-09
申请号：US13448200
申请日：2012-04-16
申请人： Xu Zhu , Michael L. Brobston , Lup M. Loh
发明人： Xu Zhu , Michael L. Brobston , Lup M. Loh
IPC分类号： H03F1/56 , H03F1/34
CPC分类号： H03F3/24 , H03F1/56 , H03F3/195 , H03F3/72 , H03F2200/111 , H03F2200/318 , H03F2203/7209 , H03F2203/7233
摘要： An apparatus and method for amplifying a transmission signals in multiple modes and multiple bands. The apparatus includes a tunable power amplifying module adapted to receive a plurality of signal types comprising multiple modes and multiple bands. The tunable power amplifying module includes a first and second power amplifier stages and a number of tunable matching networks configured to optimize an impedance value based on the mode and band of the signal to be amplified.
摘要翻译：一种用于放大多个模式和多个频带的传输信号的装置和方法。该装置包括适于接收包括多个模式和多个频带的多个信号类型的可调谐功率放大模块。可调谐功率放大模块包括第一和第二功率放大器级和多个可调匹配网络，其被配置为基于要放大的信号的模式和频带来优化阻抗值。

12. 发明申请

US20110274017A1 VERSATILE SYSTEM FOR TRANSCEIVER NOISE REDUCTION IN A TIME-DIVISION DUPLEXING WIRELESS NETWORK 审中-公开
标题翻译：时分双工无线网络中收发器噪声减少的复杂系统
公开(公告)号：US20110274017A1
公开(公告)日：2011-11-10
申请号：US13188634
申请日：2011-07-22
申请人： Michael L. Brobston , Breck W. Lovinggood , Robert W. Monroe
发明人： Michael L. Brobston , Breck W. Lovinggood , Robert W. Monroe
IPC分类号： H04B3/20
CPC分类号： H04B1/0475 , H03H7/25 , H04B1/525
摘要： A system for suppressing transmission channel noise in a signal transmission/reception device—particularly a time division duplex (TDD) wireless communications device—is provided. The system provides one or more shunt elements, instantiated at some point along the device's signal transmission channel. One or more attenuation elements are also instantiated at some point along the signal transmission channel, as are one or more disabling elements. A trigger signal indicates when the device is shifting from signal transmission operation (or mode) to signal reception operation. Responsive to assertion of the trigger signal, the shunt, attenuation and disabling elements are activated.
摘要翻译：提供一种用于抑制信号发送/接收装置（特别是时分双工（TDD）无线通信装置）中的传输信道噪声的系统。该系统提供一个或多个分流元件，在设备的信号传输通道的某个点处实例化。一个或多个衰减元件也在信号传输通道的某个点被实例化，以及一个或多个禁用元件。触发信号指示装置何时从信号传输操作（或模式）转换到信号接收操作。响应于触发信号的断言，分流，衰减和禁用元件被激活。

13. 发明授权

US07340228B2 Apparatus and method for high efficiency RF power amplification using drain bias adaptation 失效
标题翻译：使用漏极偏置适应的高效RF功率放大的装置和方法
公开(公告)号：US07340228B2
公开(公告)日：2008-03-04
申请号：US11177032
申请日：2005-07-08
申请人： Robert W. Monroe , Michael L. Brobston
发明人： Robert W. Monroe , Michael L. Brobston
IPC分类号： H04B1/04
CPC分类号： H03F1/0266 , H03F1/02 , H03F1/0244 , H03F3/189 , H03F3/24 , H03F3/245 , H03F2200/102 , H03F2200/15 , H03F2200/27 , H03F2200/336 , H04B2001/045
摘要： An RF transmitter having an RF power amplifier comprising: 1) a drive transistor that receives an input RF signal and generates an output RF signal; and 2) a drain bias adaptation circuit for supplying drain current to the drive transistor. The drain bias adaptation circuit comprises: i) a first switch for coupling the drive transistor drain to a system supply voltage; ii) a second switch for coupling the drive transistor drain to a high supply voltage that is greater than the system supply voltage; iii) a first bypass capacitor coupled to the first switch for reducing noise in the drain current when the first switch is closed and the second switch is open; and iv) a second bypass capacitor coupled to the second switch for reducing noise in the drain current when the second switch is closed and the first switch is open.
摘要翻译：一种具有RF功率放大器的RF发射器，包括：1）驱动晶体管，其接收输入RF信号并产生输出RF信号; 和2）用于向驱动晶体管提供漏极电流的漏极偏置适配电路。漏极偏置适配电路包括：i）用于将驱动晶体管漏极耦合到系统电源电压的第一开关; ii）用于将驱动晶体管漏极耦合到大于系统电源电压的高电源电压的第二开关; iii）耦合到所述第一开关的第一旁路电容器，用于当所述第一开关闭合并且所述第二开关断开时降低所述漏极电流中的噪声; 以及iv）耦合到所述第二开关的第二旁路电容器，用于当所述第二开关闭合并且所述第一开关断开时降低所述漏极电流中的噪声。

14. 发明授权

US08712348B2 Apparatus and method for controlling a tunable matching network in a wireless network 有权
标题翻译：用于控制无线网络中可调谐匹配网络的装置和方法
公开(公告)号：US08712348B2
公开(公告)日：2014-04-29
申请号：US13214892
申请日：2011-08-22
申请人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
发明人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
IPC分类号： H04B1/04 , H03H7/40
CPC分类号： H04B1/0458 , H03H7/40
摘要： An apparatus and method manage impedance values in a radio in a wireless network. The apparatus includes a tunable matching network (TMN) positioned on a path between a transceiver and an antenna. The TMN includes a plurality of immittance elements. A voltage standing wave ratio (VSWR) detector is configured to detect a ratio of a signal passing the VSWR detector and a signal reflected from the TMN. A control circuit is configured to identify an operating setting for the radio, set a number of the immittance elements based on the operating setting, monitor the ratio detected by the VSWR detector, and modify a setting of at least one of the immittance elements based on the ratio detected.
摘要翻译：无线网络中的无线电装置和方法管理阻抗值。该装置包括位于收发器和天线之间的路径上的可调匹配网络（TMN）。 TMN包括多个导纳元件。电压驻波比（VSWR）检测器被配置为检测通过VSWR检测器的信号和从TMN反射的信号的比率。控制电路被配置为识别无线电的操作设置，基于操作设置设置多个导纳元素，监视由VSWR检测器检测的比率，并且基于以下方式修改至少一个导纳元素的设置：检测比例。

15. 发明申请

US20120051409A1 APPARATUS AND METHOD FOR CONTROLLING A TUNABLE MATCHING NETWORK IN A WIRELESS NETWORK 有权
标题翻译：在无线网络中控制可调匹配网络的装置和方法
公开(公告)号：US20120051409A1
公开(公告)日：2012-03-01
申请号：US13214892
申请日：2011-08-22
申请人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
发明人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
IPC分类号： H03H7/38 , H04B1/38
CPC分类号： H04B1/0458 , H03H7/40
摘要： An apparatus and method manage impedance values in a radio in a wireless network. The apparatus includes a tunable matching network (TMN) positioned on a path between a transceiver and an antenna. The TMN includes a plurality of immittance elements. A voltage standing wave ratio (VSWR) detector is configured to detect a ratio of a signal passing the VSWR detector and a signal reflected from the TMN. A control circuit is configured to identify an operating setting for the radio, set a number of the immittance elements based on the operating setting, monitor the ratio detected by the VSWR detector, and modify a setting of at least one of the immittance elements based on the ratio detected.
摘要翻译：无线网络中的无线电装置和方法管理阻抗值。该装置包括位于收发器和天线之间的路径上的可调匹配网络（TMN）。 TMN包括多个导纳元件。电压驻波比（VSWR）检测器被配置为检测通过VSWR检测器的信号和从TMN反射的信号的比率。控制电路被配置为识别无线电的操作设置，基于操作设置设置多个导纳元素，监视由VSWR检测器检测的比率，并且基于以下方式修改至少一个导纳元素的设置：检测比例。

16. 发明授权

US07558550B2 Versatile system for multimode, wireless communication receiver with ZIF and Near-ZIF operations 失效
标题翻译：具有ZIF和Near-ZIF操作功能的多模，无线通信接收机的通用系统
公开(公告)号：US07558550B2
公开(公告)日：2009-07-07
申请号：US11326124
申请日：2006-01-05
申请人： Michael L. Brobston , Steven Loh , Seong Eun Kim , Weon Ki Yoon
发明人： Michael L. Brobston , Steven Loh , Seong Eun Kim , Weon Ki Yoon
IPC分类号： H04B1/16
CPC分类号： H04B1/30
摘要： An architecture for a receiver component in a wireless communications system is disclosed—one that supports both zero intermediate frequency (ZIF) and near-zero intermediate frequency (NZIF) operation. The architecture provides a down-conversion segment, and a local oscillator segment operatively associated with the down-conversion segment. An analog-to-digital conversion (ADC) segment is adapted to receive signals from the down-conversion segment and introduce the signals into a digital intermediate frequency (DIF) construct. The DIF construct performs a DC offset compensation or DC residue filtering on NZIF-based signals, and droop or mismatch compensation. Image removal is performed on NZIF-based signals, and DC offset compensation is performed on ZIF-based signals. Compensated signals are amplified to some nominal or desired level, and interpolation filtering of the amplified signals is performed prior to transmission thereof.
摘要翻译：公开了一种用于无线通信系统中的接收机组件的架构，其支持零中频（ZIF）和近零中频（NZIF）操作。该架构提供了一个下转换段，以及与下转换段可操作地相关联的本地振荡器段。模数转换（ADC）段适于从下转换段接收信号并将信号引入数字中频（DIF）构造。 DIF结构对基于NZIF的信号执行直流偏移补偿或直流残差滤波，以及下降或失配补偿。在基于NZIF的信号上执行图像去除，并且对基于ZIF的信号执行直流偏移补偿。补偿信号被放大到某个标称或期望电平，并且在发送之前执行放大信号的内插滤波。

17. 发明授权

US07493141B2 Common radio architecture for multi-mode multi-band applications 有权
标题翻译：用于多模式多频段应用的通用无线电架构
公开(公告)号：US07493141B2
公开(公告)日：2009-02-17
申请号：US11057459
申请日：2005-02-14
申请人： Michael L. Brobston , Seong E. Kim , Lup M. Loh
发明人： Michael L. Brobston , Seong E. Kim , Lup M. Loh
IPC分类号： H04B1/10 , H04M1/00
CPC分类号： H04B1/006
摘要： A multi-mode, multi-band mobile station for use in wireless networks operating under different air interface standards. The present invention, the mobile station comprises a plurality of low-noise amplifiers. Each of the plurality of low-noise amplifiers is optimized for use in a selected frequency band. The mobile station also comprises a near-zero intermediate frequency (NZIF) broadband image rejection mixer for receiving an amplified RF signal from a selected one of the plurality of low-noise amplifiers and down-converting the amplified RF signal to produce a first analog intermediate frequency (IF) signal.
摘要翻译：一种用于在不同空中接口标准下运行的无线网络中的多模，多频移动台。本发明中，移动台包括多个低噪声放大器。多个低噪声放大器中的每一个被优化用于所选择的频带。移动台还包括近零中频（NZIF）宽带镜像抑制混频器，用于从所述多个低噪声放大器中选定的一个放大的RF信号接收放大的RF信号，并对放大的RF信号进行下变频以产生第一模拟中间体频率（IF）信号。

18. 发明申请

US20080049868A1 Method and system for providing digital adaptive predistortion in a subscriber station 有权
标题翻译：在用户站中提供数字自适应预失真的方法和系统
公开(公告)号：US20080049868A1
公开(公告)日：2008-02-28
申请号：US11510899
申请日：2006-08-28
申请人： Michael L. Brobston
发明人： Michael L. Brobston
IPC分类号： H04L25/49
CPC分类号： H04L27/368 , H03F1/3247
摘要： A method for providing digital adaptive predistortion in a subscriber station is provided that includes applying predistortion, based on a set of predistortion characteristics, to a transmit signal to generate a predistorted signal. An amplifier input signal is generated based on the predistorted signal. The amplifier input signal is amplified to generate an amplified signal. The amplified signal is sampled to generate a sampled signal. The sampled signal is processed through a receive channel of the subscriber station to generate a processed signal. A determination is made regarding whether to adjust the set of predistortion characteristics based on the processed signal.
摘要翻译：提供了一种用于在用户站中提供数字自适应预失真的方法，其包括将基于一组预失真特性的预失真应用于发射信号以产生预失真信号。基于预失真信号产生放大器输入信号。放大器输入信号被放大以产生放大信号。对放大的信号进行采样以产生采样信号。采样信号通过用户站的接收信道进行处理，以产生处理后的信号。确定是否基于处理的信号来调整预失真特性集合。

19. 发明授权

US07031409B2 Fully digital AGC circuit with wide dynamic range and method of operation 失效
标题翻译：全数字AGC电路具有宽动态范围和操作方法
公开(公告)号：US07031409B2
公开(公告)日：2006-04-18
申请号：US10226417
申请日：2002-08-23
申请人： Michael L. Brobston , Jason Rock , Weon-Ki Yoon , Min Jeon
发明人： Michael L. Brobston , Jason Rock , Weon-Ki Yoon , Min Jeon
IPC分类号： H04L27/08
CPC分类号： H04L27/3809
摘要： A digital automatic gain control (AGC) circuit for use in a radio frequency (RF) receiver. The AGC circuit comprises: 1) a first shifter for receiving an in-phase signal as a first series of X-bit samples and left-shifting each X-bit sample by a number of bits determined by a coarse scaling factor; 2) a first limiter for receiving the D most significant bits of the output of the first shifter and outputting a subset of the D most significant bits of the first shifter output; 3) a first multiplier for multiplying the subset of the D most significant bits of the first shifter output by a fine scaling factor to produce a first M-bit product; and 4) a gain adjustment circuit for comparing a power signal derived from the first M-bit product to a maximum threshold value and generating the coarse scaling factor and the fine scaling factor.
摘要翻译：一种用于射频（RF）接收机的数字自动增益控制（AGC）电路。 AGC电路包括：1）第一移位器，用于接收同相信号作为第一系列X位采样，并且通过粗比例因子确定的多个位左移每个X位采样; 2）第一限幅器，用于接收第一移位器的输出的D个最高有效位并输出第一移位器输出的D个最高有效位的子集; 3）第一乘法器，用于将第一移位器输出的D个最高有效位的子集乘以精细比例因子以产生第一M位乘积; 以及4）增益调整电路，用于将从第一M位乘积导出的功率信号与最大阈值进行比较，并产生粗比例因子和精细比例因子。

20. 发明授权

US08000274B2 Versatile system for transceiver noise reduction in a time-division duplexing wireless network 有权
标题翻译：用于时分双工无线网络中收发器降噪的多功能系统
公开(公告)号：US08000274B2
公开(公告)日：2011-08-16
申请号：US11284466
申请日：2005-11-22
申请人： Michael L. Brobston , Breck W. Lovinggood , Robert W. Monroe
发明人： Michael L. Brobston , Breck W. Lovinggood , Robert W. Monroe
IPC分类号： H04B3/20
CPC分类号： H04B1/0475 , H03H7/25 , H04B1/525
摘要： A system for suppressing transmission channel noise in a signal transmission/reception device—particularly a time division duplex (TDD) wireless communications device—is provided. The system provides one or more shunt elements, instantiated at some point along the device's signal transmission channel. One or more attenuation elements are also instantiated at some point along the signal transmission channel, as are one or more disabling elements. A trigger signal indicates when the device is shifting from signal transmission operation (or mode) to signal reception operation. Responsive to assertion of the trigger signal, the shunt, attenuation and disabling elements are activated.
摘要翻译：提供一种用于抑制信号发送/接收装置（特别是时分双工（TDD）无线通信装置）中的传输信道噪声的系统。该系统提供一个或多个分流元件，在设备的信号传输通道的某个点处实例化。一个或多个衰减元件也在信号传输通道的某个点被实例化，以及一个或多个禁用元件。触发信号指示装置何时从信号传输操作（或模式）转换到信号接收操作。响应于触发信号的断言，分流，衰减和禁用元件被激活。

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